<template>
  <el-container class='home-container'>
    <!--    页面头部区域-->
    <el-header>
      <div>
        <img src='../assets/heima.png' alt=''>
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--    页面主体区域-->
    <el-container>
      <!--      侧边栏-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class='toggle-button' @click='toggleCollapse'>|||</div>
        <el-menu router='true' background-color="#333744" text-color="#fff" active-text-color="#409eff"
                 :collapse-transition='false' :collapse='isCollapse' :unique-opened='true' :default-active='activePath'>
          <!--          一级菜单-->
          <el-submenu :index="item.id + ''" v-for='item in menulist' :key='item.id'>
            <template slot="title">
              <i :class='iconsObj[item.id]'></i>
              <span>{{ item.authName }}</span>
            </template>
            <!--            二级菜单-->
            <el-menu-item :index="'/' + subItem.path" v-for='subItem in item.children'
                          :key='subItem.id' @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--      页面右边区域-->
      <el-main>
        <!--        路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 不折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenulist()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenulist () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮切换菜单的折叠和展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存连接激活状态
    saveNavState (activepath) {
      window.sessionStorage.setItem('activePath', activepath)
      this.activePath = activepath
    }
  }
}
</script>

<style lang="less" scoped>
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px ;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: 0;
  }
}
.el-main{
  background-color: #EAEDF1;
}
.home-container{
  height: 100%;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
